A matrix transform imager allowing high-fill factor

We present a transform imager that performs computation at the pixel plane, but still holds to a fill factor greater than 40 percent. This imager is capable of programmable matrix operations on the image, where we can represent the image as either a full matrix or using block matrix operations. Each pixel is composed of a photodiode sensor element and a multiplier. We present experimental data and results from a signal pixel, the resulting computation, and effect of mismatch and offsets through this circuit. We present the results of computing a DCT/DST transform, as well as frequency response characterizations related to these results.